Can some one please help me understand the explanation and the answer for the question# 7-B (Please find attached snap for the ques)?

I clearly see that the 7-B answer explanation itself says the statement is Inferable, but the answer mentioned is 'Not Inferable'. Am I mistaken?
Please clarify.
Thank you!!
Sorry for poor image quality.

I clearly see that the 7-B answer explanation itself says the statement is Inferable, but the answer mentioned is 'Not Inferable'. Am I mistaken?
Please clarify.
Thank you!!
Sorry for poor image quality.












