Change the following statement into passive voice.
Let me do this.
A) Let us do this.
B) This is to be done by me.
C) Let this be done by me.
D) Let I do this.

Hint:Any action in the sentence or in the clause can be represented in two ways i.e. active and passive voice and to convert the active into passive voice. Passive voice always uses the past participle form of the main verb irrespective of any tense.

Complete answer:
The meaning of ‘let me do this’ is ‘allow me to do that’.
A) Let us do this – is an incorrect answer because ‘us’ defines the plural where in the main sentence it is given ‘me’ i.e. singular. So, using this option is an incorrect choice.

B) This is to be done by me – is an incorrect answer because the meaning of ‘This is to be done by me’ is I do the majority of the work and this is incorrect and this option is not a passive voice. So, this is an incorrect answer.

C) Let this be done by me – is the correct answer because passive voice always uses the past participle form of the main verb irrespective of any tense i.e. ‘be’ is used with the past participle of the main verb o. So, this is the correct answer.

D) Let I do this – is an incorrect answer because this is grammatically incorrect.
Let me do this – Active voice

Hence, the correct answer is Option C.

Note: In active voice the subject performs the action of the verb. For example: She is going to watch a movie tonight. If the active voice or a sentence is starting with ‘LET’ that passive voice of that sentence also be starting with ‘let’. Basic rule should be followed while converting active voice into passive voice is:
Let + Subject + be + verb third form + other agents.