Double consonants are one of the most common testing points in competitive English exams.
For 'aberration', remember that it has a single 'b' but a double 'r'.
For 'belligerent', remember the double 'l' is essential.
Step 1: Identify the correctly spelled word. Check each option against standard spelling. Step 2: Analyse each option. Option 1 - beligerent: incorrect; correct spelling is belligerent (double l). Option 2 - aberration: correct. Option 3 - misconstrude: incorrect; correct spelling is misconstrued. Option 4 - ambivelent: incorrect; correct spelling is ambivalent. Step 3: Confirm. Aberration means a departure from what is normal or expected, and it is spelled correctly here. \[ \boxed{\text{aberration}} \]