________ is a neurological speech disorder that generally occurs following damage to the left cerebral hemisphere, particularly motor and premotor areas. Speech is characterized by groping attempts to find the correct articulatory position, great variability over repeated attempts, sound substitutions, omissions, additions, and difficulty sequencing sounds in multisyllabic words

Apraxia of speech is a motor or neurological speech disorder. In this type of speech disorder, a person faces difficulty in sending messages from brain to mouth. The person has difficulty in making lips movement to make a speech. The symptoms of apraxia of speech are:

Difficulty in combining syllables.
Groping attempts.
Abnormal rhythm.
Difficulty in saying long and lengthy words.
Difficulty in babbling.

So, the correct answer is apraxia of speech.