Explanations:
उपरोक्त प्रश्न के अनुसार The child is not able to learn a language mainly because of 'dyslexia.' Dyslexia is a condition in which a child faces persistent challenges in learning the names and sounds of letters because of frequently omitting substitutes or reversing the letters words while reading. अत: उपरोक्त प्रश्न का अभीष्ट उत्तर विकल्प (d) होगा।