निम्नलिखित में से कौन सी अधिगम अक्षमता (learning disability) सीधे तौर पर किसी व्यक्ति की गणितीय गणना करने की क्षमता को प्रभावित करती है?

The ability of hand-eye coordination, balance, and manual dexterity is significantly affected in which of the following learning disorders?

Murti, a grade 4 student, is able to read only at the level of a grade 1 student. He also has difficulty matching sounds, spelling words, and reading letters. Murti shows characteristics of: