In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.  
Proteins are providers of energy in an emergency, (1)/ and are primarily used as building blocking (2)/ for growth and repair of many body tissues. (3)/ No error (4)

Options

A. 1
B. 2
C. 3
D. 4

Answer

B