Whether tds would be deducted on pension?

hello friends, 

please help to solve my following query,

a son of more than 18 years of age receives a sum of Rs. 23000 per month as pension for 4 months in previous year 2011-12 after the death of his father.

now there are two questions:

is that son entitled go get any benefit of section 57 deduction of Rs. 15000 or 1/3rd  of salary ????

and is there any provision of income tax act under which the bank, through which the aforementioned amount of pension is received, can deduct TDS on this pension amount???/

please help to sort out the above query.

thanking in anticipation.