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Some relationships have been expressed through symbols which are explained below :

$\text{O} =$ greater than
$\Delta =$ not equal to
$\text{X} =$ not less than
$+ =$ equal to
$\phi =$ not greater than
$\Sigma =$ less than

What does $\text{P} \; \Sigma \; \text{Q} \; \Sigma \; \text{R}$ imply?

1. $\text{P} \; \Delta \; \text{Q} \; \phi \; \text{R}$
2. $\text{P} \; \phi \; \text{Q} + \text{R}$
3. $\text{P O Q} + \text{R}$
4. $\text{P O Q X R}$

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