The correct answer is lack of flavour.
B. lack of flavour
The correct answer is (B) Lack of flavour, dullness without distinctive, interesting or attractive qualities; without adequate taste. Also, an insipid remark, or the condition or state of being insipid.
Insipidity comes from Latin insipidus.
Examples of use:
- His lecture was a study in insipidity enlivened only by the ending bell.
- Her insipidity was unchanging for her spirit was always the same.