Won't stop to take input on the 2nd question. How do I fix this? (Multiple choice questionaire)

Question

#include<stdio.h>
int main()
{
char choice;
int s=0;

printf("choose the correct letter of the answer.\n\nyour sister is a...\n\n");
printf("a. a boy\nb. a girl\nc. an alien\nd. a possesed demon\n");
printf("enter your answer:");
scanf("%c", &choice);
if(choice=='b')
{
printf("correct\n");
s++;
}
else
{printf("wrong the correct letter is b\n");
scanf("%c", &choice);
}
printf("your are a a...\n\n");
printf("a. a boy\nb. a girl\nc. an alien\nd. a possesed demon\n");
printf("enter your answer:");
scanf("%c", &choice);
if(choice=='a')
{
printf("correct\n");
s++;
}
else
{printf("wrong the correct letter is a\n");
s=s;
}
printf("final score is: %d \n\n", s);
return 0;
}

Answer 1

Add a space prior to %c in your scanf's to consume remaining whitespace and newline characters.
scanf(" %c", &choice);