Correct option:(B) Erythropoietin and calcitriol

Solution:

• Human kidneys produces two types of hormones: Epo (erythropoietin) and calcitriol.
• Erythropoietin hormone increases the production of red blood cells.
• Calcitriol is the active form of vitamin D.
• Calcitriol hormone helps in absorption of calcium and phosphate from food.
• Calcitonin is produced by the C-cells of thyroid gland.
• Helps in regulation of calcium and phosphate levels in blood.
• Relaxin is produced by ovary and placenta.
• Helps during childbirth.