Which of the following phrases (I), (II), and (III) given below each sentence should replace the phrase printed in bold letters to make the sentence grammatically correct? Choose the best option among the five given alternatives that reflect the correct use of phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark (e) i.e., “No correction required” as the answer. 

Q:

The oldest religion to which we have clear and authentic account is probably the pure monotheism held by the Jews.
I. for which
II. of which
III. by which

• 1
  Only I is correct
• 2
  Only II is correct
• 3
  Only I and III are correct
• 4
  Both I and II are correct
• 5
  No correction required