To find out which character occurs at the 5th position in a string "How are you" in JavaScript, you can use the charAt() method.
Now, let's go through each option and explain why it is right or wrong:
A. Substring(): This option is incorrect. The substring() method is used to extract a specified part of a string and return it as a new string. It does not directly give you the character at a specific position.
B. String(): This option is incorrect. The String() function is used to convert a value to a string. It does not provide a way to access specific characters in a string.
C. Stringlength(): This option is incorrect. There is no built-in method called Stringlength() in JavaScript. This option is not relevant to the question.
D. CharAt(): This option is correct. The charAt() method is used to return the character at a specified index in a string. It takes an index as a parameter and returns the character at that index. In this case, charAt(4) will return the character at the 5th position in the string "How are you".