Question $28)$ When verifying the continuity of a ring circuit, the measured loop resistance of the line, neutral and CPC were $0\mathrm{.}99,0\mathrm{.}9$ Q and $1\mathrm{.}5$ O respectively. What is the expected test value at each socket between the line and CPC when interconnected at the board? a$)0\mathrm{.}90$ b$)1\mathrm{.}40$ c$)0\mathrm{.}45$ O d$)0\mathrm{.}6$ g