Indian Navy Entrance Test Model Paper 3

The correct answer is option 1)i.e. Let the poor not be looked down upon.
Explanation:

• The passive voice of imperative sentence starts with 'let'.
• ​Let is followed by an object.
• Here 'the poor' is the object.
• In negative sentence ' not' is used just after the object.
• Be is used before the third form of the verb.
• Always the third form of the verb is used in the passive voice.

Syntax of the sentence: Let+object+not( if it is in 'active voice')+be+third form of verb
following the above steps we finally get -" Let the poor not be looked down upon".