@sara1983 , Does RTL design will contain flip flops...
-- An RTL has the description in a high level language(VHDL/Verilog) that represents the behavior of a flop.
or does the RTL synthesized netlist will only have flops... ??
-- Look up the definition of a "netlist"!
Search - "difference RTL and netlist"
I leave it as an exercise for you, the answers are easy to find out!