Question

Books are our best friends.They are____ for mental growth. option benign , beneficial
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Answer 1

Books are our best friends.They are beneficial mental growth.

Hope this will help you

Answer 2

Books are our best friends.They are beneficial for mental growth.

• The meanings of the words are given as follows:

1. Option: a choice or an alternative

2. Benign: gentle, kind or not harmful( medically)

3. Beneficial: something which is advantageous or helpful.

• As books help in mental growth, therefore 'beneficial' is the most appropriate term in this case.

• Some of the synonyms of this word are:

Valuable, worthwhile, useful, etc.

• Some of the antonyms of this word are:

Disadvantages, detrimental, etc.