My last question is can we use SFP + ports as 10 GE ports as according to Cisco it has 16 Gbps speed???
Well, I recommended 3850 because the budget is <US$10K. If you want a 24-port non-blocking 10 Gbps switch then I don't believe you'll find anything with this
Next, your requirement does NOT specify you wanted a Layer 2 or Layer 3 switch. There is an -S and an -E version of the 3850 and the -E is a Layer 3 image with limited Layer 3 functionality. Again, your specifics (other than the budget) are very murky.