Testosterone secretion before birth is due to:

1. FSH

2. GnRH

3. HCG

4. LH

Implantation does not:
1. involve a blastocyst
2. occur in the uterine tube
3. establishes pregnancy
4. occurs by seventh-eighth day

Match column I with column II and select the correct option using the codes given below

Codes:

    A      B     C      D
1. c      d      b       a
2. c      d      a       b
3. c      a      d       b
4. a      d      c       b