Which option does not belong with the others?

Directions: Which option does not belong with the others?

Find the error and choose the correct alternative:

He does not (1)/ know to make (2)/ friends so he is leading a lonely life. (3)/ No Error (4)

Find the error and choose the correct alternative:

The house is very good (1)/ but too much small (2)/ to accommodate the full family. (3)/No Error (4)

Find the error and select the correct alternative:

Sakshi was  exorbitantly paid (1)/ for how skillful she (2)/ welcomed the visitors.(3)/ No Error (4)

Find the error and choose the correct answer:

She is almost quite competent (1)/ for the post of Marketing Executive (2)/ so if given a chance she can show the results. (3)/ No Error (4)

Choose the suitable preposition for the blank space:

We have noticed immense decline_____his moral.

Improve the bracketed part of the sentence.

Rohan has no acquaintance (from Saurabh).