In the synthesis of Angiotensin I, rennin acts on Angiotensinogen and cleaves the?

A) Leucine – leucine at 10 and 11 position B) Valine – tyrosine at 3 and 4 position C) Isoleucine – histidine at 5 and 6 position D) Proline – histidine at 7 and 8 position