The Pre-revised pay (as on 01.01.2006) of an erstwhile Group D employee is as follows, whose increment is in March :

Date --- Basic ----- Scale ---- Remarks

1.1.06 --- Rs.3140.00 --- 2550 3200 --- Pre-revised
17.3.06 --- Rs.3370.00 --- 2610 4000 S2A --- ACP (old Scheme)

Since the employee passed 10th Std. he was allowed Grade Pay of Rs.1800.00
wef 1.1.06 in PB 1 5200 20200 scale.
In his case which date of pay fixation is beneficial ?
1. As on 1.1.06 in PB 1 equivalent to pre-revised basic of Rs.3140.00
2. As on 17.03.2006 on ACP (from 1.1.06 to 16.3.06 pre-revised scale)
3. As on 1.7.2006 ie. Opting for ACP on the date of increment .

If his pay is fixed wef 1.1.06 what benefit he will get on ACP (on 17.3.06)?