Multiple choice general knowledge science & technology Sodium hydroxide KBr KI NaOH HCL Reveal answer Fill a bubble to check yourself C Correct answer Explanation Sodium hydroxide (NaOH) is a strong base composed of sodium (Na), oxygen (O), and hydrogen (H). KBr is potassium bromide, KI is potassium iodide, and HCl is hydrochloric acid - none match the formula for sodium hydroxide.