For the following metals A, B, C, D react with each other : (NR = No reaction)
`{:(A+B^(+)rarr NR,,B+C^(+) rarr NR),(B+D^(+) rarr B^(+)+D,,C+D^(+) rarr C^(+)+D),(A^(+)+C rarr C^(+)+A,,D+A^(+) rarr D^(+)+A):}`
Which is the order of the metals in increasing reducing strength?
A. `B lt D lt a lt C`
B. `C lt B lt D lt A`
C. `A lt D lt B lt C`
D. `lt C lt A lt B`
