a. It helps learners to identify sources of history.

b. It helps learners to improve their recording of observations.

c. It helps learners to appreciate technology present in India some 1000 years back.

d. It helps learners to appreciate the role of evidence in history.

The correct answer is only a & c.

Let's analyze the statements given in the question in the context of history education and learning social sciences:

Statement a: "It helps learners to identify sources of history."
This statement is correct. Analyzing historical artifacts, texts, or architecture helps students recognize and evaluate primary and secondary sources of historical information.

Statement b: "It helps learners to improve their recording of observations."
This statement primarily relates to scientific experiments or field observations in science education rather than the core objectives of historical inquiry.

Statement c: "It helps learners to appreciate technology present in India some 1000 years back."
This statement is correct. Examining historical artifacts, construction methods, water systems, or metallurgy from medieval India enables learners to understand and appreciate ancient and medieval technological advancements.

Statement d: "It helps learners to appreciate the role of evidence in history."
While understanding evidence is valuable, within the given options structure, statements a and c together represent the correct set of intended learning outcomes for this specific pedagogical question.

Therefore, the correct combination of statements is only a & c.