(a) his blood pressure was low

(b) his heart was beating slowly

(c) he was suffering from goitre

(d) his sugar level in blood was high

Correct option – ( d )

Explanation for correct option – diabetic patient will have high blood glucose due to deficiency of the hormone known as insulin . These patients are given insulin injection so as to regulate the blood glucose level . Insulin is delivered from the beta cells in islets of Langerhans situated in pancreas . It plays an important role in sugar metabolism .

Hence correct option is – his sugar level in blood was high