Antonyms

Negligent means failing to take proper care. The opposite (antonym) is 'attentive', which means paying close attention.

Partisan means prejudiced in favor of a particular cause. 'Neutral' is the opposite, meaning unbiased.

Celestial refers to the sky or outer space. 'Earthly' is the antonym, referring to things relating to the earth.

Lunatic is mad or insane. ‘Sensible’ is the opposite.

Here, counterfeit is the correct antonym of legitimate as it implies something that is inauthentic. Genuine is original, unreliable implies something that is not trustworthy and disloyal implies unfaithful.

Here, eccentric is the correct antonym for regular as it implies something that is different. Improper implies something not right, orthodox implies traditional and natural implies the usual.

Here, attractive is the correct antonym of homely as it implies something that has the power to attract. Ordinary implies something that is normal or common, domestic implies some activity related to home and informal implies something suited for everyday use.

Opaque is correct because it refers to something which is solid, such as a solid colour. With this in mind, opaque is opposite in meaning to the word clear.

 Conscientious is correct because it refers to being careful. With this in mind, it is directly opposite in meaning to careless.

Negligible means so small or unimportant as to be not worth considering, while considerable means notably large or significant. Option B correctly identifies this antonym pair. Option E 'Conserable' is a typo.

Selfish means lacking consideration for others. Considerate means careful not to cause inconvenience or hurt to others, making it the correct antonym.

 Constant means to remain the same (i.e. unchanging). With this in mind, the word with the opposite meaning is changeable. 

 Orderly refers to neat, clean and tidy, whereas congested refers to things which are tangled or stuffed into a small place. With this in mind, congested is the correct choice because it is opposite in meaning to orderly.

Conservative is tending to preserve established traditions or institutions and resisting changes, while progressive is moving forward or onward/ favouring changes and reforms.  

Dissatisfied means not content or happy with something. Contented means feeling or expressing happiness or satisfaction.