Tax deducted at sources fy 18-19

Dear Sir

I am working in nationalized bank,i have few question regarding TDS to be deducted on pension received by pensioners:-

1.Whether standard deduction is applicable for all pensioner .I.e should i deduct 40000 from gross salary to get taxable salary,are family pensioner are eligible standard deduction.

2.What is income tax rebate under sec 87a for pensioner

3.Should i deduct TDS of family pensioners.

Early reply will be appreciated  

Thanks and Regards

Harish Kumar