Q$41$: Which of the following code segments prints a single line containing hello there with the words separated by a single space?

a$.$ std::cout $<<$ "hello $"$;

std::cout $<<"$ there";

b$.$ std::cout $<<$ "hello" $,"$ there";

c$.$ std::cout $<<$ "hello";

std::cout $<<$ "there";

d$.$ std::cout $<<$ "hello";

std::cout $<<"$ there";