@akshatvishu can you place it next time in a code block, that is more readable :)

What is the type of the questions id column? I see that the question_id is an integer. If the id column on questions is a big integer you need to change the question_id to the same.

'id' column on question is this; $table->bigIncrements('id');

Then the question_id column need to be:

$table->bigInteger('question_id')->unsigned();

Or short:

$table->unsignedBigInteger('question_id');

or change $table->bigIncrements('id') to $table->increments('id');

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