Correct Answer & Explanation
Option B
To 'DECIPHER' means to make sense of, to understand, or to convert coded text into normal language. 'Reveal' means to make (something secret or unknown) known to others. When you decipher something, you reveal its meaning. Hence, 'Reveal' is a synonym.
• Conceal: to hide.
• Complicate: to make (something) more difficult or complex.
• Scramble: to make (something) disorganized or jumbled.