68) In order to ensure that the paint has the same colour from batch to batch, it is the job of a quality control specialist who checks small samples of paint from each batch.
(A) it is the job of a quality control specialist who checks small samples of paint from each batch
(B) it is the quality control specialist's job to check small samples of paint from each batch
(C) the quality control specialist who checks small samples of paint from each batch
(D) the quality control specialist checks small samples of paint from each batch
(E) small samples of paint from each batch are checked by the quality control specialist
I knew OA is D; However, I always get confused over the Subject Verb agreeement in case of relative clause.
For example, Option D has a relative clause WHO and the Answer explanation says there is NO Verb here because of relative clause and did observed the same for few more examples.
Can Someone explain the CONCEPT of VERBS in case of Relative Clauses.
(A) it is the job of a quality control specialist who checks small samples of paint from each batch
(B) it is the quality control specialist's job to check small samples of paint from each batch
(C) the quality control specialist who checks small samples of paint from each batch
(D) the quality control specialist checks small samples of paint from each batch
(E) small samples of paint from each batch are checked by the quality control specialist
I knew OA is D; However, I always get confused over the Subject Verb agreeement in case of relative clause.
For example, Option D has a relative clause WHO and the Answer explanation says there is NO Verb here because of relative clause and did observed the same for few more examples.
Can Someone explain the CONCEPT of VERBS in case of Relative Clauses.

















