Sam should be able to add question

[devukurup]

• [x] Make "Add question" button functional from page 5
• [x] Build page 6
• [x] By default there will be two options, clicking on "Add option" will add one more option
• [x] A question should have at least 2 options and 2 more options can be added, so there can be at least 2 and at most 4 options for a question, check page 7 for reference
• [x] Sam should be able to select the correct answer using the correct answer dropdown
• [x] A question cannot have more than one correct answers
• [x] For reference check out this image: https://monosnap.com/file/6irtOJqqW5TyHNBIxg40Ul1ce3gUpZ
• [x] Add unit test cases to test the options validations.