With reference to the RBC, which of the following statements is/are correct?

Q. With reference to the RBC, which of the following statements is/are correct?

(a)Before birth RBC are formed in liver and spleen

(b)After birth RBC are formed in bone marrow

(c)RBC has a lifetime of about 365 days

(d) Persons who live at high altitudes has more number of RBC then at plain Select the correct answer using the code given below

A.            1 and 2 only

B.            1, 2 and 4 only

C.            1, 2 and 3

D.            2 and 3 only

Answer: 1, 2 and 4 only