In each question given below a sentence is given and is divided into three parts A, B and C. For each part a correction statement is also given. You have to determine which part requires correction and mark it as your answer.

From of May 20, the kilogram joined a bunch of other units (a)/ — second, metre, ampere, kelvin, mole and candela (b)/ — that will no longer be compared with physical objects as standards of reference. (c)

A- As of May 20, the kilogram joined a bunch of other units —

B- second, metre, ampere, Kelvin, mole or Candela —

C- that will no longer be compares with physical objects as standards of reference.