four dight number will be like in this way(Any perfect square must end in 0,1,4,6,9,)
1100,1111,1144,1155 ,1166.,1199,
2200,2211, 2244.2255,.2266,2299,
3300,3311,3344,3355.,3366,3399,
4400,4411, 4444,4455.,4466,4499,
5500,5511, 5544,5555,5566,5599
,6600,6611,6644,6655,6666,6699
,7700,7711,7744(88^2), 7755,7766, 7799,
8800,8811,8844,8855,8866, 8899.
9900 ,9911,9944,9955,9966, 9999 here only 1 number which is perfact squre so answer is option 5) : 1