According to research on the tip-of-the-tongue phenomenon,
a. your mental dictionary is arranged in alphabetical order.
b. when an item is on the tip of your tongue, you will seldom be able to recover it.
c. you can identify similar-sounding words, but you cannot accurately guess the number of syllables in the target word.
d. you can typically provide a similar-sounding word, which matches the target word reasonably closely.