Correct Answer: sent

Solution : Given:
1. you can start ⇒ sent room dark
2. can you read ⇒ room sent less
3. you are good ⇒ tyre room spin

By comparing all the above-coded sentences, we find that –
In sentences 1 and 2, can is the common word and sent is the common code.
In sentences 1, 2 and 3, the common word is you and the common code is room .
The remaining words and codes in sentence 1 are start and dark ; in sentence 2 read and less ; in sentence 3 are / good and tyre / spin .
Finally, can ⇒ sent; you ⇒ room; start ⇒ room; read ⇒ less; are/good ⇒ tyre/spin

So, can will be coded as sent . Hence, the second option is correct.