In the given diagram, positions of four endocrine glands in the human body are marked by the letters A, B, C and D:
The correct labelling of A, B, C and D is:
1
A - pituitary gland, B - thyroid gland, C - adrenal gland, D - pancreas
2
A- adrenal gland, B - pituitary gland, C - pancreas, D - thyroid gland
3
A- adrenal gland, B - thyroid gland, C - pancreas, D - pituitary gland
4
A - pituitary gland, B - pancreas, C - thyroid gland, D - adrenal gland