Duodenum has characteristic Brunner's glands which secret two hormones called 

(a) kinase, estrogen

(b) secretin, cholecystokinin

(c) prolactin, parathromone

(d) estradion, progesterone

Audio Explanation:

(b) Brunner's gland secrete large amount of mucus and bicarbonates to protect duodenal mucosa and to neutralise the acidic chyme. It also secretes two hormones

(a) Secretin                   b) Cholecystokinin (CCK)

These stimulate:

(i) Secretion of pancreatic juice by pancreas.

(ii) Release of bile from gall bladder.

(ii) Formation of bile by liver and pancreatic juice.

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