Articles

Here, the words 'physics teacher' implies that the referral is to a particular teacher of a particular subject. And when we highlight a specific thing, we use article 'the'.

Here, the subject is neither particular nor begins with a vowel sound. Thus, option 1 is correct.

<span style="text-indent:" -0.25in;="">“The” is used before superlative form of adjective.

The sentence implies that Karamana is one of the rivers (and not the only river) flowing through Trivandrum. Opiton 1 fits the blank as the word Karamana does not begin with vowel sound.

Word 'island' not only starts with a vowel but also makes a vowel sound. Thus, option 2.

Here, the subject (captain) is neither specific nor a vowel word. Thus, option 1.

Word 'better' represents comparative degree of verb of being. With comparative degree (followed by a common noun like 'poet'), we use article 'a'.

'Map of Kerala' means map of a specific area. Thus, article 'the' is required.

Here, the subject 'Vivekananda' is a person, but he was a great saint. "Great saint" in the sentence is not a specific noun, so we must use the article 'a'. "The" cannot be used because there are more than one great saints that can be named. "An" cannot be used either because "great saint" does not begin with a vowel.

Here, a specific person is referred to. In such cases, we use article 'the'.

Aa 'white and yellow' dog' means a single dog, so article 'a' is the best choice.

We use article 'the' before collective nouns (like committee).

To refer to a specific age, we use article 'the'.

The sentence implies that Akbar was one of the greatest kings. Neither he is the only great king nor the adjective 'great' begins with a vowel. Thus, option 1.

Usage of adjective 'main' itself demands article 'the'.

Nouns like 'capital' (which are unique nouns) are always preceded by article 'the'.

The statement is a general advise or quote. For general nouns we use article 'a'. 'A politician' means 'one-&-all politicians'.

This is a general piece of advise. And for general things we use article 'a'.

Whenever we use the name of some fanous person, place or thing to represent some other, we use article 'the'.

The sentence implies that 'Gold is one of the precoius metals',  but not 'the only' precious metal. Moreover, as the word 'gold' does not start with a vowel sound, so article 'an' could not be the answer. Therefore, article 'a' is the right  choice.

Here, 'cup of tea' is neither specific nor a vowel sound word. Thus, option 1.

Here Usha is particularised or pointed at. Hence, article 'the' is required to mention the specification.

Word honest though starts with a consonant but makes a vowel sound. And for vowel sound, we use article 'an'.

'Iron' is not the only precious metal. Therefore, option 3 is eliminated. Also, word 'useful' does not start with a vowel soundbut has the sound of 'y'. Thus, option 2 is also eliminated. Hence, option 1.

Word 'elephant' begins with a vowel sound. Thus, option 2.