I. Boron has a high melting point of 2352K. So, statement I is correct. II. Boron has a low density of 2.37gcm−3. So, statement II is incorrect. III. Boron has low electrical conductivity at low temperature. So, statement III is incorrect. IV. B−10 isotope is a neutron absorber due to the high neutron cross-section of isotope 10B. So, statement IV is also correct. Hence, statements I and IV are correct.